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Further Observations on Fish Growth in a Fertilized Sea Loch (Loch Craiglin)

Published online by Cambridge University Press:  11 May 2009

F. Gross
F. Gross
Affiliation:
Department of Zoology, University of Edinburgh
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Extract

Flounders grew much more slowly in 1944 than during the previous 2 years. From October 1943 to October 1944 their mean size increased from 7·9 cm., 6·8 g., to 12·7 cm., 23·6 g., an increment which was if anything smaller than under normal conditions. The reason for the reduction in growth rate is attributed to the increasingly unfavourable hydrographic conditions resulting from the prolonged closure of the dam, in particular to the high H2S concentration, the high pH and the low oxygen concentration of the water.

In the autumn of 1944 the sluice gate of the dam was opened for several months. In 1945/46 the growth of stock III flounders was very rapid. They reached a mean size of 32·3 cm., 409 g., in March 1946 and 36·8 cm., 580 g., in March/April 1947. Native flounders reached a mean size of 30·6 cm., 353 g., in 2 years.

Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 28 , Issue 1 , June 1949 , pp. 1 - 8
Copyright
Copyright © Marine Biological Association of the United Kingdom 1949

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References

REFERENCES

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